OPERATIONAL AMPLIFIER WITH INTERMEDIATE PUSH-PULL "BENT" CASCODE ON COMPLEMENTARY FIELD-EFFECT TRANSISTORS Russian patent published in 2025 - IPC H03F3/45 

FIELD: microelectronics.

SUBSTANCE: in the operational amplifier, the gate of the first input field-effect transistor is connected to the first non-inverting input of the device, its source is connected to the source of the fourth input field-effect transistor, the gate of the third input field-effect transistor is connected to the first non-inverting input of the device, and its source is connected to the source of the second input field-effect transistor, wherein the drain of the second input field-effect transistor is connected to the source of the first output field-effect transistor of the intermediate stage, drain of fourth input field-effect transistor is connected to source of second output field-effect transistor of intermediate stage, gates of the second and fourth input field-effect transistors are connected to the second inverting input of the device, the drain of the first input field-effect transistor is connected to the third bias voltage source, the drain of the third input field-effect transistor is connected to the fourth bias voltage source.

EFFECT: reduced effect of parasitic capacitances of reference current sources I₁, I₂, which establish static mode of input differential stage, and their non-identity on static and dynamic parameters of operational amplifier with push-pull "bent" cascode.

5 cl, 10 dwg